Directional Gyro, Electrical, Luftwaffe Fl22561 Kurskreisel AT-6 The book is in good

The book is in good condition given its age

This type of gauge was the primary tool used to lean the large radial engines in service late in the piston-powered aircraft era

Once wound and case closed

25in diameter and ~8in deep

Aichi M6A Submarine-launched Attack Seaplane Seiran

Directional Gyro, Electrical, Luftwaffe Fl22561 Kurskreisel AT-6 The book is in goodThis is a WWII era Directional Gyro Fl22561 as used in bombers Dornier Do 17, Junkers Ju 88, and night fighter Bf 110 of the German Luftwaffe. According to our friends at DeutscheLuftwaffe. DE, this instrument was part of the Siemens K 4 course control system, and could be used as a stand alone course display system, and in conjunction with the PKS 11 patina course controller and the PDS three rotor control system. With the left knob depressed, the